Smogon DID NOT set up Uber to be a banlist for OU, just that that is how it has been treated for the past 3 years. Uber is supposed to be those too powerful for OU play, the amount a pokemon appears has NOTHING to do with the uber category, and EVERYTHING to do with the OverUsed category (hence, the name). Salamence is faaaar from being too powerful for OU play due to it's huge weaknesses, low health, and low defense. The ability to strategy around a Salamence is trivial at best as almost all teams have at least a pokemon with an ice attack, if not a dedicated ice pokemon.
The fact is that no Pokemon in OU is capable of switching into every move on the MixMence set except Cressilia who is destroyed by Scizor and Tyranitar,which in the Mence era were both in top 10 usage constantly,Mence's attacking stats are just too good.
And with Intimidate it can switch into a lot of neutral attacks.
Also,every team in the Salamence era had 3+ checks for him proves he was broken IMO.
And just because you have an ice attack doesn't mean you can beat Salamence unless it's Ice Shard.
And no Ice Pokemon can switch into Draco Meteor,meaning you have to sacrifice a Pokemon to get your ice type in,and once you do Salamence will just switch out and come back in later to rip another Pokemon appart with DM.
Dragon's are just too good this generation,and I really like the Salamence-less metagame.
It's more diverse and a lot less centralized,not every team requires a Scizor now and there are a lot of different stall breakers instead of every team just using Salamence to rip stall appart.
Just my opinions but I think Smogon has done a very good job trying to balance out this broken generation..I hate to see it,but the fact is that the 3 dragons that have been banned really needed it,they're just way too good now.